We found that at random intervals, all apps installed get updated, even when the user is not logged in. You can mitigate this issue by disabling auto app updates in the Play Store app. This is caused by hotword detection that constantly pings the host.
You cannot mitigate this issue by disabling host audio input because the CPU cost is primarily caused by the time that it takes to travel to the guest from the host. However, you can mitigate this issue by revoking microphone permissions from the Google app.
The third source of high CPU usage is animations. We have found that by optimizing the graphics driver stack we can also reduce CPU usage even when the emulator is not idle.
We will be rolling out graphics driver optimizations incrementally as part of Project Marble. These system images include improved memory usage for guest-side graphics drivers. You can now launch multiple instances of the same AVD and run them concurrently. Instances that you launch after the first instance are read-only, and their changes to the guest virtual disk are discarded on exit.
To run multiple instances of the same AVD at the same time, launch any instances after the first instance from the command line using the -read-only flag. This feature is made possible by copying the QCOW2 files associated with the writable parts of the Android image. To help you manage disk space, we have also bundled the qemu-img command line tool to allow you to pre-commit QCOW2 files before launching multiple instances. This property means that the instances share much of their RAM in common.
Use this feature to run tests that require multiple devices to run in parallel. We appreciate your feedback on possible use cases that are part of your normal interactive or CI workflow. Please create or upvote issues in Issue Tracker. By pre-allocating and mapping guest RAM as a file, the emulator can now save Quickboot snapshots during runtime, instead of doing all of the work on exit.
If you currently experience long save times when closing your emulators, enable this feature to improve your Quickboot performance. By default, a Quickboot snapshot is saved on exit and loaded again every time, like suspending and waking a real device. Because Android guest RAM is now auto-saved by default, if you want to define a device state and repeatedly load from that state, you need to tell the emulator to discard changes after each session.
You can do this in the following ways:. Snapshots that are taken and loaded through the Snapshots UI function as they did before, with no file mapping. Because this is a large change to how Quickboot works, we would greatly appreciate your feedback on whether it improves Quickboot performance and what kind of issues you encounter when using it.
When you start the emulator from a snapshot either using the -snapshot command line option, or launching from a snapshot in the AVD manager the emulator disables both auto-saving for Quickboot snapshots and saving Quickboot snapshots on exit.
This reduces the chances that the Quickboot snapshot will be unintentionally overwritten, and avoids slow fallback paths that do not use file-backed Quickboot snapshots. This update includes the following QEMU changes:.
On Windows, more webcams are now supported because the emulator dynamically resizes the camera frames that are delivered from the webcam. This feature also prevents errors in frame delivery from causing the emulator to hang. To address issues with running out of disk space on Play Store images, the emulator now automatically resizes the userdata partition to 6 GB when running with a fresh Play Store AVD.
We would like to mention HAXM 7. HAXM 7. Due to low usage and high maintenance costs, we are planning to deprecate the bit version of the Android Emulator that runs on Windows. We will roll out a transition plan before removal and end-of-life for the bit version of the Android Emulator. However, we are actively seeking any feedback or concerns with this future change. Please let us know in Issue Tracker if you currently rely on the bit version of the Android Emulator that runs on Windows and tell us how we can best work with you going forward.
Some users reported that the emulator has been running slow. If your AVD's config. You can find the config. To help you diagnose these issues, we have added more informative error messages. You can enable these error messages by running the emulator from the command line using the -verbose flag. You can now save multiple AVD snapshots for a given device configuration and choose which of the saved snapshots to load when you start the emulator.
Starting with Android Studio 3. To accommodate this expansion of the snapshot features, we have added a Snapshots category to the Extended controls dialog. This new pane contains controls for saving and loading AVD snapshots, including the controls for saving and loading the quick-boot snapshot that had previously been in the Settings pane. This update includes bug fixes and improved support for large amounts of RAM.
This change should greatly decrease the time needed to load a snapshot. For details, see Configuring VM acceleration. The screen recording controls are in the Screen record tab of the Extended Controls window. To begin screen recording, click the Start recording button in the Screen record tab. To stop recording, click Stop recording.
Controls for playing and saving the recorded video are at the bottom of the Screen record tab. You can also record and save a screen recording from the emulator using the following command on the command line:.
Developing and testing augmented reality apps AR with ARCore is now even easier with the new virtual scene camera, which allows you to experiment with your AR experience within a virtual environment.
For information on using the virtual scene camera in the emulator, see Run AR apps in Android Emulator.
You can now load a Quick Boot snapshot without restarting the emulator. To load a snapshot, open the Extended Controls window to the Settings page and click the Load Now button.
We have made many improvements to the loading and saving of snapshots to improve efficiency of resource usage and to minimize the time that each operation takes. When using images for API 27 or later, the emulator can render the Android UI with Skia , which can render more smoothly and efficiently.
To enable Skia rendering, use the following commands in adb shell: su setprop debug. On Windows, Android Emulator now uses Media Foundation as the webcam back end, which greatly improves performance and frame rate for webcam capture, up to p 30 FPS. The -phone-number-prefix command-line option has been changed to -phone-number [number] , which allows setting of the full phone number.
If you are still experiencing hangs or other instabilities, please file an issue. With this update, a current system image, and a preview version of Android Studio, you can use Android Emulator to run augmented reality applications built with ARCore.
To work with Android 8. By default, emulators with device skin files are now shown without a surrounding window frame. To show the surrounding window frame, enable Show window frame around device in the Settings pane of the Extended Controls window. See the full list of changes in the QEMU 2. New Quick Boot feature provides faster emulator start times, based on a snapshot of your AVD instance.
Quick Boot is enabled by default for all AVDs. Although the first time you start an AVD it must perform a cold boot just like powering on a device , all subsequent starts are fast and the system is restored to the state at which you closed the emulator similar to waking a device. If you want to control when the emulator saves a snapshot, open the emulator's Extended controls window and click Settings.
Here, you can select one of the following settings for Save quick boot state on exit :. For more information, see the Quick Boot documentation. The older -gpu swiftshader and -gpu angle options are now deprecated.
By default, the emulator uses the Android Studio HTTP proxy settings, but this screen allows you to define a manual proxy configuration. For example, you can launch the emulator and let VNC listen to port as follows:.
To use Mac's built-in screen sharing client, a VNC password is required when launching the emulator. To set a password, use this command:. And then enter change vnc password into the console, and enter a password. Clicking File a bug opens a dialog where you can see the bug report details such as the screenshot, the AVD configuration info, and a bug report log.
You can then save the report for yourself or report emulator issues. Added gyroscope sensor to emulator and virtual sensors panel. This requires a system image with gyroscope support to work currently API level 24 and Added experimental macOS Hypervisor. Framework support for bit x86 images on macOS OpenGL ES 3.
Emulator now uses offscreen OpenGL FBOs for all rendering except final display image posting, which should help with color consistency issues across platforms. After collecting data on sudden emulator slowdown issues, we have determined that the problem may have to do with some interaction between older Intel OpenGL drivers and Windows updates.
This release is compatible with API level It also includes a number of performance improvements and bug fixes. Note: HAXM v6. Version This release contains a variety of performance improvements, new features, and bug fixes. Content and code samples on this page are subject to the licenses described in the Content License.
Android Studio. Download What's new User guide Preview. Features overview Release notes. Android Developers. Android Emulator is included with Android Studio.
Versions of the emulator prior to Added support for virtio-vsock in userspace. Future system images will use virtio-console for logcat and kernel messages. Speed up Vulkan rendering. Added support for snapshot debugging on test failure. Added snapshot support for the 'asg' type graphics transports.
KVMclock enabled by default on newer system images. Added support for a heart rate sensor to Wear emulators. Removed libportability Vulkan backend. Added support for more features in modem simulator.
Foldables support with virtual hinge sensor and 3D view Added support for hinge sensors for foldable devices. Hinge sensor is now enabled by default. Due to how emulator rendering works, we now process virtio-gpu virtqueue in the vcpu thread because rendering is offloaded to other threads anyway. In a future system image the emulator will be able to run all graphics with a virtio-gpu based stack.
The emulator now supports audio streaming in containers over WebRTC. This can improve accuracy of time measurements from the guest. We now track which extended control pane was selected by the user in metrics. Emulator now uses LZ4 to decompress guest kernels, making it compatible with the modern kernel pipeline. Fixes: embedded emulator Clipboard should now work. Fixed issue where uppercase characters were delivered as lower case characters in the emulator.
Fixed loading console token from a unicode path in windows. Fixed a snapshot corruption issue when sending snapshot commands through gRPC, as well as when pressing the snapshot save button in Android Studio embedded emulator. General fixes We've seen compatibility issues running the Windows emulator with Riot Vanguard active. The Windows emulator now detects Vanguard anti-cheat and pops up a warning message if Vanguard is detected. We now use WSAEventSelect instead of select for establishing non-blocking connections to loopback servers.
Fixed bouncing icon on launch for MacOs. If hw. Fixed an issue where if the emulator window was minimized while the extended controls window was open but not active, the extended controls window would keep showing up when resizing the emulator window. We will completely remove the behavior the case with active extended controls window in a future update.
Fixed a flaky bug with Wi-Fi not connected when the emulator starts. Fixed hang-on-exit when emulator issues shell commands with long or indefinite timeouts. Updated pc-bios with fixes to better support large images passed to -initrd ; previous BIOS used a very inefficient method. Fixed crash during termination when -wifi-server-port option is used. The emulator now prints a warning if unsupported options are passed to -prop Only qemu.
When building the emulator on Windows, there should be less chance of seeing flaky failures to write to files. For more information, see the Windows build instructions. Disabled Zoom button for foldable AVDs, which was causing issues. Emulator now correctly reports boot time coming from a device reboot. Linux: In the case where there are insufficient KVM permissions, the emulator now prints debugging instructions more promptly.
Fixed issue where the emulator could not boot recent system images with no acceleration. Fixed memory corruption or crash on start from a boot-completed detector. Fixed memory leak during long screen recording sessions. Emulator icons updated to reflect Studio 4. Added better support for detecting remote sessions on Windows.
Fixes: graphics and video decode Fixed an issue where latest Asphalt 9 game rendered with a black screen. Removed spam about flushing mapped buffer with NULL. Fixed a race condition when tearing down Vulkan state when a guest Vulkan app exited. It brings the PS2 experience to your desktop and offers high-end graphics and sound.
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